1 /* 2 * Based on LiMon - BOOTP. 3 * 4 * Copyright 1994, 1995, 2000 Neil Russell. 5 * (See License) 6 * Copyright 2000 Roland Borde 7 * Copyright 2000 Paolo Scaffardi 8 * Copyright 2000-2004 Wolfgang Denk, wd@denx.de 9 */ 10 11 #include <common.h> 12 #include <command.h> 13 #include <net.h> 14 #include "bootp.h" 15 #include "tftp.h" 16 #include "nfs.h" 17 #ifdef CONFIG_STATUS_LED 18 #include <status_led.h> 19 #endif 20 21 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ 22 23 #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ 24 #ifndef CONFIG_NET_RETRY_COUNT 25 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 26 #else 27 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 28 #endif 29 30 #define PORT_BOOTPS 67 /* BOOTP server UDP port */ 31 #define PORT_BOOTPC 68 /* BOOTP client UDP port */ 32 33 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ 34 #define CONFIG_DHCP_MIN_EXT_LEN 64 35 #endif 36 37 ulong BootpID; 38 int BootpTry; 39 #ifdef CONFIG_BOOTP_RANDOM_DELAY 40 ulong seed1, seed2; 41 #endif 42 43 #if defined(CONFIG_CMD_DHCP) 44 dhcp_state_t dhcp_state = INIT; 45 unsigned long dhcp_leasetime = 0; 46 IPaddr_t NetDHCPServerIP = 0; 47 static void DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 48 unsigned len); 49 50 /* For Debug */ 51 #if 0 52 static char *dhcpmsg2str(int type) 53 { 54 switch (type) { 55 case 1: return "DHCPDISCOVER"; break; 56 case 2: return "DHCPOFFER"; break; 57 case 3: return "DHCPREQUEST"; break; 58 case 4: return "DHCPDECLINE"; break; 59 case 5: return "DHCPACK"; break; 60 case 6: return "DHCPNACK"; break; 61 case 7: return "DHCPRELEASE"; break; 62 default: return "UNKNOWN/INVALID MSG TYPE"; break; 63 } 64 } 65 #endif 66 67 #if defined(CONFIG_BOOTP_VENDOREX) 68 extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ 69 extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ 70 #endif 71 72 #endif 73 74 static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) 75 { 76 Bootp_t *bp = (Bootp_t *) pkt; 77 int retval = 0; 78 79 if (dest != PORT_BOOTPC || src != PORT_BOOTPS) 80 retval = -1; 81 else if (len < sizeof (Bootp_t) - OPT_SIZE) 82 retval = -2; 83 else if (bp->bp_op != OP_BOOTREQUEST && 84 bp->bp_op != OP_BOOTREPLY && 85 bp->bp_op != DHCP_OFFER && 86 bp->bp_op != DHCP_ACK && 87 bp->bp_op != DHCP_NAK ) { 88 retval = -3; 89 } 90 else if (bp->bp_htype != HWT_ETHER) 91 retval = -4; 92 else if (bp->bp_hlen != HWL_ETHER) 93 retval = -5; 94 else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { 95 retval = -6; 96 } 97 98 debug("Filtering pkt = %d\n", retval); 99 100 return retval; 101 } 102 103 /* 104 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet 105 */ 106 static void BootpCopyNetParams(Bootp_t *bp) 107 { 108 IPaddr_t tmp_ip; 109 110 NetCopyIP(&NetOurIP, &bp->bp_yiaddr); 111 #if !defined(CONFIG_BOOTP_SERVERIP) 112 NetCopyIP(&tmp_ip, &bp->bp_siaddr); 113 if (tmp_ip != 0) 114 NetCopyIP(&NetServerIP, &bp->bp_siaddr); 115 memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6); 116 #endif 117 if (strlen(bp->bp_file) > 0) 118 copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); 119 120 debug("Bootfile: %s\n", BootFile); 121 122 /* Propagate to environment: 123 * don't delete exising entry when BOOTP / DHCP reply does 124 * not contain a new value 125 */ 126 if (*BootFile) { 127 setenv ("bootfile", BootFile); 128 } 129 } 130 131 static int truncate_sz (const char *name, int maxlen, int curlen) 132 { 133 if (curlen >= maxlen) { 134 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", 135 name, curlen, maxlen); 136 curlen = maxlen - 1; 137 } 138 return (curlen); 139 } 140 141 /* 142 * Check if autoload is enabled. If so, use either NFS or TFTP to download 143 * the boot file. 144 */ 145 static void auto_load(void) 146 { 147 const char *s = getenv("autoload"); 148 149 if (s != NULL) { 150 if (*s == 'n') { 151 /* 152 * Just use BOOTP to configure system; 153 * Do not use TFTP to load the bootfile. 154 */ 155 NetState = NETLOOP_SUCCESS; 156 return; 157 } 158 #if defined(CONFIG_CMD_NFS) 159 if (strcmp(s, "NFS") == 0) { 160 /* 161 * Use NFS to load the bootfile. 162 */ 163 NfsStart(); 164 return; 165 } 166 #endif 167 } 168 TftpStart(TFTPGET); 169 } 170 171 #if !defined(CONFIG_CMD_DHCP) 172 173 static void BootpVendorFieldProcess (u8 * ext) 174 { 175 int size = *(ext + 1); 176 177 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, 178 *(ext + 1)); 179 180 NetBootFileSize = 0; 181 182 switch (*ext) { 183 /* Fixed length fields */ 184 case 1: /* Subnet mask */ 185 if (NetOurSubnetMask == 0) 186 NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2)); 187 break; 188 case 2: /* Time offset - Not yet supported */ 189 break; 190 /* Variable length fields */ 191 case 3: /* Gateways list */ 192 if (NetOurGatewayIP == 0) { 193 NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2)); 194 } 195 break; 196 case 4: /* Time server - Not yet supported */ 197 break; 198 case 5: /* IEN-116 name server - Not yet supported */ 199 break; 200 case 6: 201 if (NetOurDNSIP == 0) { 202 NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2)); 203 } 204 #if defined(CONFIG_BOOTP_DNS2) 205 if ((NetOurDNS2IP == 0) && (size > 4)) { 206 NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4)); 207 } 208 #endif 209 break; 210 case 7: /* Log server - Not yet supported */ 211 break; 212 case 8: /* Cookie/Quote server - Not yet supported */ 213 break; 214 case 9: /* LPR server - Not yet supported */ 215 break; 216 case 10: /* Impress server - Not yet supported */ 217 break; 218 case 11: /* RPL server - Not yet supported */ 219 break; 220 case 12: /* Host name */ 221 if (NetOurHostName[0] == 0) { 222 size = truncate_sz ("Host Name", sizeof (NetOurHostName), size); 223 memcpy (&NetOurHostName, ext + 2, size); 224 NetOurHostName[size] = 0; 225 } 226 break; 227 case 13: /* Boot file size */ 228 if (size == 2) 229 NetBootFileSize = ntohs (*(ushort *) (ext + 2)); 230 else if (size == 4) 231 NetBootFileSize = ntohl (*(ulong *) (ext + 2)); 232 break; 233 case 14: /* Merit dump file - Not yet supported */ 234 break; 235 case 15: /* Domain name - Not yet supported */ 236 break; 237 case 16: /* Swap server - Not yet supported */ 238 break; 239 case 17: /* Root path */ 240 if (NetOurRootPath[0] == 0) { 241 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size); 242 memcpy (&NetOurRootPath, ext + 2, size); 243 NetOurRootPath[size] = 0; 244 } 245 break; 246 case 18: /* Extension path - Not yet supported */ 247 /* 248 * This can be used to send the information of the 249 * vendor area in another file that the client can 250 * access via TFTP. 251 */ 252 break; 253 /* IP host layer fields */ 254 case 40: /* NIS Domain name */ 255 if (NetOurNISDomain[0] == 0) { 256 size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size); 257 memcpy (&NetOurNISDomain, ext + 2, size); 258 NetOurNISDomain[size] = 0; 259 } 260 break; 261 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 262 case 42: /* NTP server IP */ 263 NetCopyIP(&NetNtpServerIP, (IPaddr_t *) (ext + 2)); 264 break; 265 #endif 266 /* Application layer fields */ 267 case 43: /* Vendor specific info - Not yet supported */ 268 /* 269 * Binary information to exchange specific 270 * product information. 271 */ 272 break; 273 /* Reserved (custom) fields (128..254) */ 274 } 275 } 276 277 static void BootpVendorProcess (u8 * ext, int size) 278 { 279 u8 *end = ext + size; 280 281 debug("[BOOTP] Checking extension (%d bytes)...\n", size); 282 283 while ((ext < end) && (*ext != 0xff)) { 284 if (*ext == 0) { 285 ext++; 286 } else { 287 u8 *opt = ext; 288 289 ext += ext[1] + 2; 290 if (ext <= end) 291 BootpVendorFieldProcess (opt); 292 } 293 } 294 295 debug("[BOOTP] Received fields: \n"); 296 if (NetOurSubnetMask) 297 debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask); 298 299 if (NetOurGatewayIP) 300 debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP); 301 302 if (NetBootFileSize) 303 debug("NetBootFileSize : %d\n", NetBootFileSize); 304 305 if (NetOurHostName[0]) 306 debug("NetOurHostName : %s\n", NetOurHostName); 307 308 if (NetOurRootPath[0]) 309 debug("NetOurRootPath : %s\n", NetOurRootPath); 310 311 if (NetOurNISDomain[0]) 312 debug("NetOurNISDomain : %s\n", NetOurNISDomain); 313 314 if (NetBootFileSize) 315 debug("NetBootFileSize: %d\n", NetBootFileSize); 316 317 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 318 if (NetNtpServerIP) 319 debug("NetNtpServerIP : %pI4\n", &NetNtpServerIP); 320 #endif 321 } 322 323 /* 324 * Handle a BOOTP received packet. 325 */ 326 static void 327 BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 328 unsigned len) 329 { 330 Bootp_t *bp; 331 332 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", 333 src, dest, len, sizeof (Bootp_t)); 334 335 bp = (Bootp_t *)pkt; 336 337 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 338 return; 339 340 /* 341 * Got a good BOOTP reply. Copy the data into our variables. 342 */ 343 #ifdef CONFIG_STATUS_LED 344 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); 345 #endif 346 347 BootpCopyNetParams(bp); /* Store net parameters from reply */ 348 349 /* Retrieve extended information (we must parse the vendor area) */ 350 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 351 BootpVendorProcess((uchar *)&bp->bp_vend[4], len); 352 353 NetSetTimeout(0, (thand_f *)0); 354 355 debug("Got good BOOTP\n"); 356 357 auto_load(); 358 } 359 #endif 360 361 /* 362 * Timeout on BOOTP/DHCP request. 363 */ 364 static void 365 BootpTimeout(void) 366 { 367 if (BootpTry >= TIMEOUT_COUNT) { 368 puts ("\nRetry count exceeded; starting again\n"); 369 NetStartAgain (); 370 } else { 371 NetSetTimeout (TIMEOUT, BootpTimeout); 372 BootpRequest (); 373 } 374 } 375 376 /* 377 * Initialize BOOTP extension fields in the request. 378 */ 379 #if defined(CONFIG_CMD_DHCP) 380 static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) 381 { 382 u8 *start = e; 383 u8 *cnt; 384 #if defined(CONFIG_BOOTP_PXE) 385 char *uuid; 386 size_t vci_strlen; 387 u16 clientarch; 388 #endif 389 390 #if defined(CONFIG_BOOTP_VENDOREX) 391 u8 *x; 392 #endif 393 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 394 char *hostname; 395 #endif 396 397 *e++ = 99; /* RFC1048 Magic Cookie */ 398 *e++ = 130; 399 *e++ = 83; 400 *e++ = 99; 401 402 *e++ = 53; /* DHCP Message Type */ 403 *e++ = 1; 404 *e++ = message_type; 405 406 *e++ = 57; /* Maximum DHCP Message Size */ 407 *e++ = 2; 408 *e++ = (576 - 312 + OPT_SIZE) >> 8; 409 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 410 411 if (ServerID) { 412 int tmp = ntohl (ServerID); 413 414 *e++ = 54; /* ServerID */ 415 *e++ = 4; 416 *e++ = tmp >> 24; 417 *e++ = tmp >> 16; 418 *e++ = tmp >> 8; 419 *e++ = tmp & 0xff; 420 } 421 422 if (RequestedIP) { 423 int tmp = ntohl (RequestedIP); 424 425 *e++ = 50; /* Requested IP */ 426 *e++ = 4; 427 *e++ = tmp >> 24; 428 *e++ = tmp >> 16; 429 *e++ = tmp >> 8; 430 *e++ = tmp & 0xff; 431 } 432 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 433 if ((hostname = getenv ("hostname"))) { 434 int hostnamelen = strlen (hostname); 435 436 *e++ = 12; /* Hostname */ 437 *e++ = hostnamelen; 438 memcpy (e, hostname, hostnamelen); 439 e += hostnamelen; 440 } 441 #endif 442 443 #if defined(CONFIG_BOOTP_PXE) 444 clientarch = CONFIG_BOOTP_PXE_CLIENTARCH; 445 *e++ = 93; /* Client System Architecture */ 446 *e++ = 2; 447 *e++ = (clientarch >> 8) & 0xff; 448 *e++ = clientarch & 0xff; 449 450 *e++ = 94; /* Client Network Interface Identifier */ 451 *e++ = 3; 452 *e++ = 1; /* type field for UNDI */ 453 *e++ = 0; /* major revision */ 454 *e++ = 0; /* minor revision */ 455 456 uuid = getenv("pxeuuid"); 457 458 if (uuid) { 459 if (uuid_str_valid(uuid)) { 460 *e++ = 97; /* Client Machine Identifier */ 461 *e++ = 17; 462 *e++ = 0; /* type 0 - UUID */ 463 464 uuid_str_to_bin(uuid, e); 465 e += 16; 466 } else { 467 printf("Invalid pxeuuid: %s\n", uuid); 468 } 469 } 470 471 *e++ = 60; /* Vendor Class Identifier */ 472 vci_strlen = strlen(CONFIG_BOOTP_VCI_STRING); 473 *e++ = vci_strlen; 474 memcpy(e, CONFIG_BOOTP_VCI_STRING, vci_strlen); 475 e += vci_strlen; 476 #endif 477 478 #if defined(CONFIG_BOOTP_VENDOREX) 479 if ((x = dhcp_vendorex_prep (e))) 480 return x - start; 481 #endif 482 483 *e++ = 55; /* Parameter Request List */ 484 cnt = e++; /* Pointer to count of requested items */ 485 *cnt = 0; 486 #if defined(CONFIG_BOOTP_SUBNETMASK) 487 *e++ = 1; /* Subnet Mask */ 488 *cnt += 1; 489 #endif 490 #if defined(CONFIG_BOOTP_TIMEOFFSET) 491 *e++ = 2; 492 *cnt += 1; 493 #endif 494 #if defined(CONFIG_BOOTP_GATEWAY) 495 *e++ = 3; /* Router Option */ 496 *cnt += 1; 497 #endif 498 #if defined(CONFIG_BOOTP_DNS) 499 *e++ = 6; /* DNS Server(s) */ 500 *cnt += 1; 501 #endif 502 #if defined(CONFIG_BOOTP_HOSTNAME) 503 *e++ = 12; /* Hostname */ 504 *cnt += 1; 505 #endif 506 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 507 *e++ = 13; /* Boot File Size */ 508 *cnt += 1; 509 #endif 510 #if defined(CONFIG_BOOTP_BOOTPATH) 511 *e++ = 17; /* Boot path */ 512 *cnt += 1; 513 #endif 514 #if defined(CONFIG_BOOTP_NISDOMAIN) 515 *e++ = 40; /* NIS Domain name request */ 516 *cnt += 1; 517 #endif 518 #if defined(CONFIG_BOOTP_NTPSERVER) 519 *e++ = 42; 520 *cnt += 1; 521 #endif 522 /* no options, so back up to avoid sending an empty request list */ 523 if (*cnt == 0) 524 e -= 2; 525 526 *e++ = 255; /* End of the list */ 527 528 /* Pad to minimal length */ 529 #ifdef CONFIG_DHCP_MIN_EXT_LEN 530 while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN) 531 *e++ = 0; 532 #endif 533 534 return e - start; 535 } 536 537 #else 538 /* 539 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! 540 */ 541 static int BootpExtended (u8 * e) 542 { 543 u8 *start = e; 544 545 *e++ = 99; /* RFC1048 Magic Cookie */ 546 *e++ = 130; 547 *e++ = 83; 548 *e++ = 99; 549 550 #if defined(CONFIG_CMD_DHCP) 551 *e++ = 53; /* DHCP Message Type */ 552 *e++ = 1; 553 *e++ = DHCP_DISCOVER; 554 555 *e++ = 57; /* Maximum DHCP Message Size */ 556 *e++ = 2; 557 *e++ = (576 - 312 + OPT_SIZE) >> 16; 558 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 559 #endif 560 561 #if defined(CONFIG_BOOTP_SUBNETMASK) 562 *e++ = 1; /* Subnet mask request */ 563 *e++ = 4; 564 e += 4; 565 #endif 566 567 #if defined(CONFIG_BOOTP_GATEWAY) 568 *e++ = 3; /* Default gateway request */ 569 *e++ = 4; 570 e += 4; 571 #endif 572 573 #if defined(CONFIG_BOOTP_DNS) 574 *e++ = 6; /* Domain Name Server */ 575 *e++ = 4; 576 e += 4; 577 #endif 578 579 #if defined(CONFIG_BOOTP_HOSTNAME) 580 *e++ = 12; /* Host name request */ 581 *e++ = 32; 582 e += 32; 583 #endif 584 585 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 586 *e++ = 13; /* Boot file size */ 587 *e++ = 2; 588 e += 2; 589 #endif 590 591 #if defined(CONFIG_BOOTP_BOOTPATH) 592 *e++ = 17; /* Boot path */ 593 *e++ = 32; 594 e += 32; 595 #endif 596 597 #if defined(CONFIG_BOOTP_NISDOMAIN) 598 *e++ = 40; /* NIS Domain name request */ 599 *e++ = 32; 600 e += 32; 601 #endif 602 #if defined(CONFIG_BOOTP_NTPSERVER) 603 *e++ = 42; 604 *e++ = 4; 605 e += 4; 606 #endif 607 608 *e++ = 255; /* End of the list */ 609 610 return e - start; 611 } 612 #endif 613 614 void 615 BootpRequest (void) 616 { 617 volatile uchar *pkt, *iphdr; 618 Bootp_t *bp; 619 int ext_len, pktlen, iplen; 620 621 #if defined(CONFIG_CMD_DHCP) 622 dhcp_state = INIT; 623 #endif 624 625 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ 626 unsigned char bi_enetaddr[6]; 627 int reg; 628 ulong tst1, tst2, sum, m_mask, m_value = 0; 629 630 if (BootpTry ==0) { 631 /* get our mac */ 632 eth_getenv_enetaddr("ethaddr", bi_enetaddr); 633 634 debug("BootpRequest => Our Mac: "); 635 for (reg=0; reg<6; reg++) 636 debug("%x%c", bi_enetaddr[reg], reg==5 ? '\n' : ':'); 637 638 /* Mac-Manipulation 2 get seed1 */ 639 tst1=0; 640 tst2=0; 641 for (reg=2; reg<6; reg++) { 642 tst1 = tst1 << 8; 643 tst1 = tst1 | bi_enetaddr[reg]; 644 } 645 for (reg=0; reg<2; reg++) { 646 tst2 = tst2 | bi_enetaddr[reg]; 647 tst2 = tst2 << 8; 648 } 649 650 seed1 = tst1^tst2; 651 652 /* Mirror seed1*/ 653 m_mask=0x1; 654 for (reg=1;reg<=32;reg++) { 655 m_value |= (m_mask & seed1); 656 seed1 = seed1 >> 1; 657 m_value = m_value << 1; 658 } 659 seed1 = m_value; 660 seed2 = 0xB78D0945; 661 } 662 663 /* Random Number Generator */ 664 665 for (reg=0;reg<=0;reg++) { 666 sum = seed1 + seed2; 667 if (sum < seed1 || sum < seed2) 668 sum++; 669 seed2 = seed1; 670 seed1 = sum; 671 672 if (BootpTry<=2) { /* Start with max 1024 * 1ms */ 673 sum = sum >> (22-BootpTry); 674 } else { /*After 3rd BOOTP request max 8192 * 1ms */ 675 sum = sum >> 19; 676 } 677 } 678 679 printf ("Random delay: %ld ms...\n", sum); 680 for (reg=0; reg <sum; reg++) { 681 udelay(1000); /*Wait 1ms*/ 682 } 683 #endif /* CONFIG_BOOTP_RANDOM_DELAY */ 684 685 printf("BOOTP broadcast %d\n", ++BootpTry); 686 pkt = NetTxPacket; 687 memset ((void*)pkt, 0, PKTSIZE); 688 689 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 690 691 /* 692 * Next line results in incorrect packet size being transmitted, resulting 693 * in errors in some DHCP servers, reporting missing bytes. Size must be 694 * set in packet header after extension length has been determined. 695 * C. Hallinan, DS4.COM, Inc. 696 */ 697 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ 698 iphdr = pkt; /* We need this later for NetSetIP() */ 699 pkt += IP_HDR_SIZE; 700 701 bp = (Bootp_t *)pkt; 702 bp->bp_op = OP_BOOTREQUEST; 703 bp->bp_htype = HWT_ETHER; 704 bp->bp_hlen = HWL_ETHER; 705 bp->bp_hops = 0; 706 bp->bp_secs = htons(get_timer(0) / 1000); 707 NetWriteIP(&bp->bp_ciaddr, 0); 708 NetWriteIP(&bp->bp_yiaddr, 0); 709 NetWriteIP(&bp->bp_siaddr, 0); 710 NetWriteIP(&bp->bp_giaddr, 0); 711 memcpy (bp->bp_chaddr, NetOurEther, 6); 712 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); 713 714 /* Request additional information from the BOOTP/DHCP server */ 715 #if defined(CONFIG_CMD_DHCP) 716 ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); 717 #else 718 ext_len = BootpExtended((u8 *)bp->bp_vend); 719 #endif 720 721 /* 722 * Bootp ID is the lower 4 bytes of our ethernet address 723 * plus the current time in ms. 724 */ 725 BootpID = ((ulong)NetOurEther[2] << 24) 726 | ((ulong)NetOurEther[3] << 16) 727 | ((ulong)NetOurEther[4] << 8) 728 | (ulong)NetOurEther[5]; 729 BootpID += get_timer(0); 730 BootpID = htonl(BootpID); 731 NetCopyLong(&bp->bp_id, &BootpID); 732 733 /* 734 * Calculate proper packet lengths taking into account the 735 * variable size of the options field 736 */ 737 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 738 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 739 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 740 NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); 741 742 #if defined(CONFIG_CMD_DHCP) 743 dhcp_state = SELECTING; 744 NetSetHandler(DhcpHandler); 745 #else 746 NetSetHandler(BootpHandler); 747 #endif 748 NetSendPacket(NetTxPacket, pktlen); 749 } 750 751 #if defined(CONFIG_CMD_DHCP) 752 static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp) 753 { 754 uchar *end = popt + BOOTP_HDR_SIZE; 755 int oplen, size; 756 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 757 int *to_ptr; 758 #endif 759 760 while (popt < end && *popt != 0xff) { 761 oplen = *(popt + 1); 762 switch (*popt) { 763 case 1: 764 NetCopyIP (&NetOurSubnetMask, (popt + 2)); 765 break; 766 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 767 case 2: /* Time offset */ 768 to_ptr = &NetTimeOffset; 769 NetCopyLong ((ulong *)to_ptr, (ulong *)(popt + 2)); 770 NetTimeOffset = ntohl (NetTimeOffset); 771 break; 772 #endif 773 case 3: 774 NetCopyIP (&NetOurGatewayIP, (popt + 2)); 775 break; 776 case 6: 777 NetCopyIP (&NetOurDNSIP, (popt + 2)); 778 #if defined(CONFIG_BOOTP_DNS2) 779 if (*(popt + 1) > 4) { 780 NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4)); 781 } 782 #endif 783 break; 784 case 12: 785 size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen); 786 memcpy (&NetOurHostName, popt + 2, size); 787 NetOurHostName[size] = 0; 788 break; 789 case 15: /* Ignore Domain Name Option */ 790 break; 791 case 17: 792 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen); 793 memcpy (&NetOurRootPath, popt + 2, size); 794 NetOurRootPath[size] = 0; 795 break; 796 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 797 case 42: /* NTP server IP */ 798 NetCopyIP (&NetNtpServerIP, (popt + 2)); 799 break; 800 #endif 801 case 51: 802 NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2)); 803 break; 804 case 53: /* Ignore Message Type Option */ 805 break; 806 case 54: 807 NetCopyIP (&NetDHCPServerIP, (popt + 2)); 808 break; 809 case 58: /* Ignore Renewal Time Option */ 810 break; 811 case 59: /* Ignore Rebinding Time Option */ 812 break; 813 case 66: /* Ignore TFTP server name */ 814 break; 815 case 67: /* vendor opt bootfile */ 816 /* 817 * I can't use dhcp_vendorex_proc here because I need 818 * to write into the bootp packet - even then I had to 819 * pass the bootp packet pointer into here as the 820 * second arg 821 */ 822 size = truncate_sz ("Opt Boot File", 823 sizeof(bp->bp_file), 824 oplen); 825 if (bp->bp_file[0] == '\0' && size > 0) { 826 /* 827 * only use vendor boot file if we didn't 828 * receive a boot file in the main non-vendor 829 * part of the packet - god only knows why 830 * some vendors chose not to use this perfectly 831 * good spot to store the boot file (join on 832 * Tru64 Unix) it seems mind bogglingly crazy 833 * to me 834 */ 835 printf("*** WARNING: using vendor " 836 "optional boot file\n"); 837 memcpy(bp->bp_file, popt + 2, size); 838 bp->bp_file[size] = '\0'; 839 } 840 break; 841 default: 842 #if defined(CONFIG_BOOTP_VENDOREX) 843 if (dhcp_vendorex_proc (popt)) 844 break; 845 #endif 846 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt); 847 break; 848 } 849 popt += oplen + 2; /* Process next option */ 850 } 851 } 852 853 static int DhcpMessageType(unsigned char *popt) 854 { 855 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) 856 return -1; 857 858 popt += 4; 859 while ( *popt != 0xff ) { 860 if ( *popt == 53 ) /* DHCP Message Type */ 861 return *(popt + 2); 862 popt += *(popt + 1) + 2; /* Scan through all options */ 863 } 864 return -1; 865 } 866 867 static void DhcpSendRequestPkt(Bootp_t *bp_offer) 868 { 869 volatile uchar *pkt, *iphdr; 870 Bootp_t *bp; 871 int pktlen, iplen, extlen; 872 IPaddr_t OfferedIP; 873 874 debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); 875 pkt = NetTxPacket; 876 memset ((void*)pkt, 0, PKTSIZE); 877 878 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 879 880 iphdr = pkt; /* We'll need this later to set proper pkt size */ 881 pkt += IP_HDR_SIZE; 882 883 bp = (Bootp_t *)pkt; 884 bp->bp_op = OP_BOOTREQUEST; 885 bp->bp_htype = HWT_ETHER; 886 bp->bp_hlen = HWL_ETHER; 887 bp->bp_hops = 0; 888 bp->bp_secs = htons(get_timer(0) / 1000); 889 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by 890 * the server yet */ 891 892 /* 893 * RFC3046 requires Relay Agents to discard packets with 894 * nonzero and offered giaddr 895 */ 896 NetWriteIP(&bp->bp_giaddr, 0); 897 898 memcpy (bp->bp_chaddr, NetOurEther, 6); 899 900 /* 901 * ID is the id of the OFFER packet 902 */ 903 904 NetCopyLong(&bp->bp_id, &bp_offer->bp_id); 905 906 /* 907 * Copy options from OFFER packet if present 908 */ 909 910 /* Copy offered IP into the parameters request list */ 911 NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr); 912 extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); 913 914 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 915 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 916 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 917 918 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); 919 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY 920 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); 921 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ 922 NetSendPacket(NetTxPacket, pktlen); 923 } 924 925 /* 926 * Handle DHCP received packets. 927 */ 928 static void 929 DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 930 unsigned len) 931 { 932 Bootp_t *bp = (Bootp_t *)pkt; 933 934 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", 935 src, dest, len, dhcp_state); 936 937 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 938 return; 939 940 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", 941 src, dest, len, dhcp_state); 942 943 switch (dhcp_state) { 944 case SELECTING: 945 /* 946 * Wait an appropriate time for any potential DHCPOFFER packets 947 * to arrive. Then select one, and generate DHCPREQUEST response. 948 * If filename is in format we recognize, assume it is a valid 949 * OFFER from a server we want. 950 */ 951 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); 952 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 953 if (strncmp(bp->bp_file, 954 CONFIG_SYS_BOOTFILE_PREFIX, 955 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) { 956 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 957 958 debug("TRANSITIONING TO REQUESTING STATE\n"); 959 dhcp_state = REQUESTING; 960 961 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 962 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 963 964 NetSetTimeout(TIMEOUT, BootpTimeout); 965 DhcpSendRequestPkt(bp); 966 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 967 } 968 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 969 970 return; 971 break; 972 case REQUESTING: 973 debug("DHCP State: REQUESTING\n"); 974 975 if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) { 976 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 977 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 978 BootpCopyNetParams(bp); /* Store net params from reply */ 979 dhcp_state = BOUND; 980 printf ("DHCP client bound to address %pI4\n", &NetOurIP); 981 982 auto_load(); 983 return; 984 } 985 break; 986 case BOUND: 987 /* DHCP client bound to address */ 988 break; 989 default: 990 puts ("DHCP: INVALID STATE\n"); 991 break; 992 } 993 994 } 995 996 void DhcpRequest(void) 997 { 998 BootpRequest(); 999 } 1000 #endif /* CONFIG_CMD_DHCP */ 1001